CN101737488B - Method and system for controlling transmission - Google Patents
Method and system for controlling transmission Download PDFInfo
- Publication number
- CN101737488B CN101737488B CN200910208506.0A CN200910208506A CN101737488B CN 101737488 B CN101737488 B CN 101737488B CN 200910208506 A CN200910208506 A CN 200910208506A CN 101737488 B CN101737488 B CN 101737488B
- Authority
- CN
- China
- Prior art keywords
- stroke pressure
- stroke
- control unit
- speed
- difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
- F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H2061/0477—Smoothing ratio shift by suppression of excessive engine flare or turbine racing during shift transition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
- F16H2061/0492—Smoothing ratio shift for high engine torque, e.g. during acceleration or uphill driving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2342/00—Calibrating
- F16H2342/04—Calibrating engagement of friction elements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
A method for controlling a transmission includes applying a reference stroke pressure to an oncoming control element while executing a downshift to a target gear, determining a stroke pressure adjustment in response to a turbine speed flare during the downshift, and re-executing the downshift while applying to the oncoming element an adapted stroke pressure that is a sum of the stroke pressure adjustment and the reference stroke pressure.
Description
Technical field
Present invention relates in general to the method and system for the automatic transmission of motor vehicle, the ratio changing especially producing in this speed changer by the control unit of for example the friction type clutch and break.
Background technique
For slide or all situations lowering category that power is closed under in synchronous automatic transmission the shift quality of adjustment brilliance be difficult.Difficult especially under the low speed situation that this adjustment is lower at vehicle noise and number of gear ratio steps is maximum.Slide the design to Complete Synchronization automatic transmission that lowers category and bring maximum restriction.
Control strategy requires adjustment flexibility to guarantee level and smooth lowering category consistent under all operating modes, but traditional shift control strategy is not enough to meet the current requirement of sliding property of automatic shft and cost.
Incorrect travel of clutch pressure can cause gear-shift locking (tie-up) or skid too much.Vehicle operators is very easy to perceive this gear shift.Locking or the gear shift of skidding also can cause the damage to control unit repeatedly.
Traditional stroke pressure amending method depends on the analysis of the behavior of the ratio changing to Clutch Control automatic transmission.They reach the amount of time adjustment stroke pressure of the predetermined percentage that gear shift completes based on it.This method is in most of the cases effectively to measured event, but in the time that other event is used identical information, they sometimes cause incorrect modification.
Therefore, industry needs a kind of technology of assessing shift event and being applicable to being applied to the pressure on non-control unit, stroke pressure is not assessed before described non-control unit and therefore can not be adapted to bad gear shift.
Summary of the invention
The object of the invention is to provide a kind of method and system of the control speed changer that overcomes the problems referred to above.
According to one aspect of the invention, provide a kind of for controlling the method for speed changer, comprise: application is carried out simultaneously and lowered category to target shift to the control unit of next operation with reference to stroke pressure; Secondary speed during responding this and lowering category skids and determines that stroke pressure regulates; Re-execute this lower category simultaneously by the stroke pressure after changing (its for stroke pressure regulate and with reference to stroke pressure sum) be applied to the control unit that this next one moves.
The method can further comprise: the maximum of determining transmission output speed changes the maximum difference between speed and minimum change speed; If this difference is greater than with reference to difference, responds this difference and determine that stroke pressure regulates; And re-execute lower category simultaneously by the stroke pressure after changing (its be the second stroke pressure regulate and with reference to stroke pressure sum) be applied to the control unit of this next one operation.
Algorithm that should be based on skidding be sane, because it operates at the quantity of skidding under the pedal situation that approaches stable state, light moment of torsion, closes and based on occurring.This algorithm evaluation shift event is to adapt to this non-control unit.
This controlling method is measured this and is skidded and correspondingly regulate subsequently the stroke pressure on the clutch of next operation deteriorated to prevent the shift quality in any future of causing owing to skidding.This controlling method also prevents from excessively obtaining stroke pressure, its can cause locking and shift quality deteriorated.
According to a further aspect in the invention, provide a kind of for controlling the method for speed changer, comprise:
Application is carried out simultaneously and is lowered category to target shift to the control unit of next operation with reference to stroke pressure;
Determine the difference between maximum value and the minimum value of change speed of the rotating speed of the output shaft of described speed changer;
If described difference is greater than with reference to poor, responds described difference and determine that stroke pressure regulates;
Using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category.
In accordance with a further aspect of the present invention, provide a kind of for controlling the system of transmission downshifts, comprise:
Turbine;
The control unit of next operation;
Output shaft;
Be configured to reference to stroke force applications to the control unit of described next operation carry out simultaneously lower category to the secondary speed during lowering category described in target shift, response skid determine stroke pressure regulate, using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications to the controller lowering category described in re-executing in the control unit of described next operation.
In conjunction with detailed description, claim and accompanying drawing below, the scope of the applicability of preferred embodiment will become apparent.Be with should be appreciated that, indicated preferred embodiment of the present invention although describe with object lesson, it is only in order to illustrate.Various changes to the embodiment who describes and example and modification are obvious for those skilled in the art.
Accompanying drawing explanation
By reference to the accompanying drawings with additional claim referring to detailed description of the preferred embodiment, other features of the present invention will become and be easier to understand.
Fig. 1 is the schematic diagram that shows the motion setting of automatic transmission.
Fig. 2 is the jointing state of friction element and the chart of separated state that has shown the speed changer in control graph 1.
Fig. 3 be can applying control strategy system.
Fig. 4 be presented at determine that stroke is pressure controlled and lower category during a series of chart that changes of some variablees.
Fig. 5 is the logical flow chart of algorithm, is the size of gear change renewal control unit stroke pressure below in this algorithm.
Embodiment
Description, has illustrated the engine crankshaft 12 that is fixed to fluid torque converter 14 in Fig. 1, this fluid torque converter 14 comprises impeller 16, blade type turbine 18, stator 20, free wheel device or overrunning clutch 22, lock-up clutch 24 and torsional vibration damper 26.In the time that clutch 24 separates, leave impeller 16 hydraulic fluid fluid motion drive turbine 18.In the time that clutch 24 engages, engine crankshaft 12 directly drives turbine 18.Turbine 18 drives the input shaft 28 of automatic transmission 30, and its input shaft 28 and output shaft 30 align.
Simple planetary gear set 32 comprises and is fixed to the ring gear 34 of input shaft 28, the planetary carrier 34 that is connected to the first solenoidoperated cluthes 36 and the second solenoidoperated cluthes 38, planetary pinion 40 and the central gear 42 fixing with respect to housing 44.Input shaft 28 directly drives the 3rd solenoidoperated cluthes 46.
Ravigneaux (Ravigneaux) formula double planetary gear unit 50 comprises central gear 52,54, is supported on the planetary pinion 58 engaging on gear carrier 56 and with planetary pinion 60 and central gear 54.Ring gear 24 engages with planetary pinion 58.
Fig. 2 has shown the joint of the friction control element 36,38,46,62,64 turning round at the lower control speed changer 30 of seven patterns (six forward gearss and retreat shelves) and the form of separated state.These seven patterns are corresponding to seven paired combinations in three clutches 36,38,46 and two breaks 62,64.For example, by only changing in two friction elements of (by single gear shift exclusively) joint a realization from each next one that is incorporated in gamut, or that change after this.
As shown in Figure 2, in the time that engaging, clutch 36 and break 64 produce the second forward gears.Engage by maintaining clutch 36, breakaway detents 64 and engage brake 62 produce and lower category to first grade.In the time carrying out from the lowering category of 2-1, control unit out of service is that the control unit of break 64 and next operation is break 62.In the time carrying out the lowering category of 3-2, control unit out of service is that the control unit of clutch 38 and next operation is break 64.
Refer now to Fig. 3, electronic controller 70 comprises the central processing unit (CPU) 71 of communicating by letter with multiple input signal and comprises the electronic memory 72 that is stored in control algorithm wherein with the readable code form of CPU.The storage of each control unit (for example clutch 36,38,46 and break 62,64) comprises radix stroke pressure 108.Described in Fig. 5, the result that responds previous gear shift regulates keep-alive storage (KAM) unit 73 that upgrades each control unit with stroke pressure.The content of KAM unit 73 add to each gear shift control unit with reference to stroke pressure or radix stroke pressure to be created in the stroke pressure after the adaptation using in each gear shift of determining after the nearest pressure controlled gear shift of stroke changes.
Input signal comprises the signal 74 being produced by accelerator pedal sensor 76 (its response vehicle operators produces to the manual control of accelerator pedal 78 signal that represents required vehicle torque).Sensor 80 produces that representative is produced by turbine 18 and the big or small signal 82 of the moment of torsion that transmitted by input shaft 28.Input signal 84 represents car speed.Input signal 86 represents engine throttle position, the degree that engine air throttle 88 is opened.Input signal 90 represents speed changer oil temperature TOT.Input signal 92 represents engineer coolant temperature.Input signal 94 represents the rotating speed of output shaft 80.Input signal 93 represents the position of gear lever (PRNDL) 94.Input signal 95 represents the rotating speed of output shaft 30.
Skid or locking depends on the stroke pressure of the control unit of next operation very doughtily by any speed of turbine 18.Stroke pressure is in the next control unit moving, to be enough to fill drive the servo cylinder of control unit to overcome servomechanism spring-back force and to absorb the gap in servomechanism and control unit, but the pressure of the hydraulic fluid of the control unit transfer of torque that is not enough to move by the next one.
Although described the self adaptive control that 2-1 lowers category here, this control is applicable to the accelerator pedal 78 that has approximation steady state situation and close or discharge, and preferably the rotating speed of turbine 18 lowers category lower than any of engine speed.
100 places in Fig. 4, controller 70 issuing commands are carried out from current shelves to the 2-1 of target shift and are lowered category.The synchronous speed of secondary speed (NTBART) the 102 head for target shelves (for example first grade) that filter after initially reducing increases.The rotating speed that synchronous speed input shaft 28 and turbine 18 when speed changer operates at target shift under current car speed have.
The rotating speed that can see input shaft 28 and turbine 18 is above synchronous speed 104 or surmount it and skid, because the radix stroke pressure of the element (break 62) of next operation or too low with reference to stroke pressure 108.If the rotating speed of input shaft 28 and turbine 18 is lower than synchronous speed 104, speed changer becomes and is easy to locking.
The rotating speed (NOBART 14) of the output shaft 30 filtering during lowering category reduces.During lowering category, controller 70 monitors the change speed 116 (dot_noflt) of NOBART 114 and NOBART 114 repeatedly.Controller 70 is determined repeatedly maximum difference or the maximum difference 122 between the maximum value 118 of change speed 116 of NOBART 114 and maximum value 118 and the minimum value 120 of the change speed 116 of minimum value 120 and NOBART 114 during lowering category.
Refer now to the algorithm of Fig. 5, at step 130 place, controller 70 orders start low moment of torsion and lower category, and for example 2-1 or 3-2 lower category.Before execution step 130, the control unit 62 of the next operation of necessary adjustment is to use slippage adaptive functions; Temperature of transmission 90 must be upper with reference to restriction and lower between limiting; Engineer coolant temperature 92 must be between limiting in upper reference restriction and lower reference; Power transmission system must just produce and drive, and moment of torsion transfers to wheel of vehicle from motor; Must set up the current code lowering category of indication.If each in these standards is all satisfied, execution step 130.
At step 132 place, make test to determine whether to occur carrying out the disable condition of revising stroke pressure control algorithm.Disable condition comprises: be greater than maximum reference position pedal position 74, pedal position 74 change speed maximum with reference to changing on speed, the rotating speed 95 of output shaft 30 be greater than maximum be greater than with reference to the change speed of rotating speed, rotating speed with reference to rotating speed or lower than minimum maximum with reference to the output shaft 30, the turbine moment of torsion that change speed be greater than Maximum Torque or lower than minimum with reference to the change speed of moment of torsion, turbine moment of torsion maximum with reference to change on speed and PRNDL 94 not at activation point.If the result of 132 places tests be logic just, exit control at step 134 place.
If the result of 132 places tests is for negative, controls and advance to step 136, maximum value 118 and the minimum value 120 of the derivative of the output shaft rotating speed 114 reach synchronous speed 104 with secondary speed 102 after these place's controller 70 storages occur in instruction 100 before.
At step 138 place, controller 70 waits for that secondary speed 102 reaches the difference between maximum value and the minimum value 120 of the synchronous speed 104 of target shift and the derivative of definite output shaft rotating speed 114.
At step 140 place, whether the difference that controller 70 is carried out between maximum value 118 and the minimum value 120 of testing the derivative to determine output shaft rotating speed 114 is greater than adjustable with reference to difference.
If the test result at step 140 place, for just, reduces or does not change the stroke pressure adjusting in KAM unit 73 at step 142 place controller 70, because indicated locking.In the time carrying out relevant lowering category subsequently, retrieve rows stroke pressure regulates from KAM unit 73 to use indexing parameter (control unit 62 of next operation and relevant lowering category) at step 152 place controller 70.By stroke pressure is regulated, to add to reference to stroke pressure or radix stroke pressure 108 be that relevant lowering category controlled amended stroke pressure to controller 70 subsequently, and during follow-up lowering category by amended stroke pressure but not be applied to the control unit 62 of next operation with reference to stroke pressure 108.
If the result of step 140 place test, for negative, 106 is recorded in storage 72 skidding in the maximum of the gear shift stage secondary speed on synchronous speed 104 that occurs of end at step 144 place controller 70.
At step 146 place, make test and 106 whether be greater than adjustable reference and skid to determine to skid.Step 146 place carries out and tests the inaccuracy that in the data of being obtained to avoid, noise causes.
If the test result at step 146 place, for negative, controlled and advanced to step 148 place, the stroke pressure that can not contain the KAM unit 73 of the control unit 62 of next one operation at this place regulates makes change.
Upgrade the stroke pressure of the control unit 62 of next operation if fully large skidding for just, occurred the test result at step 146 place.At step 150 place, regulate in the KAM unit 73 that is arranged on the control unit 62 that the relevant next one lowering category moves to the 106 suitable adjustable stroke pressure that skid.
In the time carrying out relevant lowering category subsequently, use indexing parameter (control unit 62 and the relevant 2-1 of next operation lower category) retrieve rows stroke pressure from KAM unit 73 to regulate at step 152 place controller 70.Controller 70 by stroke pressure is regulated add to reference to stroke pressure or radix stroke pressure and during follow-up lowering category by amended stroke pressure but not produce the amended stroke pressure for lowering category with reference to the control unit 62 that stroke pressure 108 is applied to next operation.
Algorithm is based on the analysis of shift event is before obtained to correct pressure.Skid as the basis of surveying not enough stroke pressure condition and increase stroke pressure.Locking is surveyed and is used for surveying space stroke pressure situation and reduces or do not increase stroke pressure.
According to Patent Law relevant regulations, preferred embodiment is described.But, it should be noted except illustrate with describe also can put into practice alternate embodiments.
Claims (17)
1. for controlling a method for speed changer, comprise:
Carry out simultaneously and lower category to target shift to the control unit of next operation with reference to stroke force applications;
Secondary speed during lowering category described in response skids and determines that stroke pressure regulates;
Using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category;
Determine the difference between maximum value and the minimum value of change speed of transmission output speed;
If described difference is greater than with reference to difference, responds described difference and determine that the second stroke pressure regulates;
Using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category.
2. the method for claim 1, is characterized in that, further comprises:
After the stroke pressure of the described reference of application, increase in the described next control unit moving and be greater than the described pressure with reference to stroke pressure;
Be greater than the described data that produce during with reference to stroke pressure from the pressure in the control unit of described next operation and determine that described stroke pressure regulates.
3. the method for claim 1, is characterized in that, further comprises:
Increase described secondary speed towards the synchronous speed of described target shift.
4. the method for claim 1, is characterized in that, it is characterized in that, described stroke pressure regulates along with described size of skidding changes.
5. the method for claim 1, is characterized in that, described stroke pressure regulates and can be zero.
6. the method for claim 1, is characterized in that, determines described difference from reaching at described secondary speed the data that produce before the synchronous speed of described target shift during described lowering category.
7. the method for claim 1, is characterized in that, described the second stroke pressure regulates along with the size of described difference changes.
8. the method for claim 1, is characterized in that, described the second stroke pressure regulates and can be zero.
9. for controlling a method for speed changer, comprise:
Application is carried out simultaneously and is lowered category to target shift to the control unit of next operation with reference to stroke pressure;
Determine the difference between maximum value and the minimum value of change speed of the rotating speed of the output shaft of described speed changer;
If described difference is greater than with reference to poor, responds described difference and determine that stroke pressure regulates;
Using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category.
10. method as claimed in claim 9, is characterized in that, determines described difference from reaching at secondary speed the data that produce before the synchronous speed of described target shift during described lowering category.
11. methods as claimed in claim 9, is characterized in that, described stroke pressure regulates along with the size of described difference changes.
12. methods as claimed in claim 9, is characterized in that, described stroke pressure regulates and can be zero.
13. methods as claimed in claim 9, is characterized in that, further comprise:
The secondary speed of response during described lowering category skids and determines that the second stroke pressure regulates;
If described difference is lower than with reference to difference, using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category.
14. methods as claimed in claim 13, is characterized in that, further comprise:
After the stroke pressure of the described reference of application, increase in the described next control unit moving and be greater than the described pressure with reference to stroke pressure;
Be greater than the described data that produce during with reference to stroke pressure from the pressure in the control unit of described next operation and determine that described the second stroke pressure regulates.
15. methods as claimed in claim 13, is characterized in that, further comprise:
Increase described secondary speed towards the synchronous speed of described target shift.
16. methods as claimed in claim 13, is characterized in that, described the second stroke pressure regulates along with described size of skidding changes.
17. 1 kinds for controlling the system of transmission downshifts, comprises:
Turbine;
The control unit of next operation;
Output shaft;
Be configured to reference to stroke force applications to the control unit of described next operation carry out simultaneously lower category to the secondary speed during lowering category described in target shift, response skid determine stroke pressure regulate, using regulate as described stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications to the controller lowering category described in re-executing in the control unit of described next operation; If the described difference of maximum difference that described controller is further configured between maximum value and the minimum value of change speed of the rotating speed of determining described output shaft is greater than with reference to poor, respond described difference determine stroke pressure regulate, using regulate as the second stroke pressure and described with reference to the modification of stroke pressure sum after stroke force applications described in re-executing in the described next control unit moving, lower category.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/277,356 US8180538B2 (en) | 2008-11-25 | 2008-11-25 | Adapting stroke pressure of a transmission control element |
| US12/277,356 | 2008-11-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101737488A CN101737488A (en) | 2010-06-16 |
| CN101737488B true CN101737488B (en) | 2014-05-28 |
Family
ID=42197069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910208506.0A Active CN101737488B (en) | 2008-11-25 | 2009-10-28 | Method and system for controlling transmission |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US8180538B2 (en) |
| CN (1) | CN101737488B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8688336B2 (en) * | 2010-09-09 | 2014-04-01 | GM Global Technology Operations LLC | System and method for controlling power downshifts of a transmission |
| JP5686751B2 (en) * | 2011-02-03 | 2015-03-18 | ジヤトコ株式会社 | Shift control device for automatic transmission |
| KR101316290B1 (en) * | 2011-06-20 | 2013-10-08 | 기아자동차주식회사 | Shift Control Method for Automatic Transmission |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845618A (en) * | 1986-07-10 | 1989-07-04 | Nissan Motor Company, Ltd. | Hydraulic pressure control for reducing engagement shock of automatic transmission |
| US5577980A (en) * | 1995-06-30 | 1996-11-26 | General Motors Corporation | Shift flare control |
| US5951615A (en) * | 1997-06-03 | 1999-09-14 | Ford Global Technologies, Inc. | Closed-loop adaptive fuzzy logic hydraulic pressure control for an automatic transmission having synchronous gear ratio changes |
| KR20100091498A (en) * | 2009-02-10 | 2010-08-19 | 콘티넨탈 오토모티브 시스템 주식회사 | Method and method for controlling line pressure of transminssion of vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2656055B1 (en) | 1989-12-18 | 1994-04-29 | Lepelletier Pierre | MULTI-SPEED AUTOMATIC TRANSMISSION FOR MOTOR VEHICLE. |
| US7451034B2 (en) | 2006-03-10 | 2008-11-11 | Ford Global Technologies, Llc | Traction control using dynamic tire friction potential |
-
2008
- 2008-11-25 US US12/277,356 patent/US8180538B2/en active Active
-
2009
- 2009-10-28 CN CN200910208506.0A patent/CN101737488B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845618A (en) * | 1986-07-10 | 1989-07-04 | Nissan Motor Company, Ltd. | Hydraulic pressure control for reducing engagement shock of automatic transmission |
| US5577980A (en) * | 1995-06-30 | 1996-11-26 | General Motors Corporation | Shift flare control |
| US5951615A (en) * | 1997-06-03 | 1999-09-14 | Ford Global Technologies, Inc. | Closed-loop adaptive fuzzy logic hydraulic pressure control for an automatic transmission having synchronous gear ratio changes |
| KR20100091498A (en) * | 2009-02-10 | 2010-08-19 | 콘티넨탈 오토모티브 시스템 주식회사 | Method and method for controlling line pressure of transminssion of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100131161A1 (en) | 2010-05-27 |
| US8180538B2 (en) | 2012-05-15 |
| CN101737488A (en) | 2010-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5551930A (en) | Adaptive control method for an automatic transmission | |
| US5580332A (en) | Method for determining the fill time of a transmission clutch | |
| US9360107B2 (en) | Transmission and method of controlling clutch during ratio change | |
| CN102840322B (en) | The gear-shifting control method of automatic transmission | |
| US20070117677A1 (en) | Shift control device of vehicular automatic transmission | |
| CN101523090B (en) | Apparatus and method for controlling continuously variable transmission and program for performing the control method | |
| US9989146B1 (en) | Adaptive clutch slip learning for critical capacity clutch fusing in a continuously variable transmission | |
| CN103392084B (en) | The control gear of speed changer and the braking torque of speed changer produce determination methods | |
| JP2008223939A (en) | Hydraulic control device of automatic transmission | |
| US8849530B2 (en) | Determination of transmission clutch control values using PID control logic during power-on upshift | |
| US7731629B2 (en) | Control apparatus for vehicle and method of controlling vehicle | |
| US10295053B2 (en) | Method and control for operating transmission during clutch failure | |
| CA2594072A1 (en) | Control apparatus for vehicular automatic transmission and method of controlling vehicular automatic transmission | |
| CN103261754A (en) | Gear shift apparatus and control method thereof | |
| CN101797919B (en) | Control device for vehicle drive device and control method for vehicle drive device | |
| US20070117676A1 (en) | Shift control device and shift control method of automatic transmission | |
| US8965653B2 (en) | Partial prefill of clutch for coast downshift conditions in a vehicle | |
| CN101737488B (en) | Method and system for controlling transmission | |
| CN101506550A (en) | Control device of automatic transmission, control method, program for executing the control method by computer and recording medium for recording program | |
| CN101566228B (en) | Control device for automatic transmission | |
| CN103299111B (en) | Automatic transmission unit and method for determining abnormal gearshift level of transmission | |
| DE112009004495B4 (en) | Control device and control method for a drive source | |
| JP4967722B2 (en) | Vehicle control apparatus and control method | |
| CN101846179B (en) | Adaptive shift learn control for automatic transmissions | |
| US10174833B2 (en) | Vehicle deceleration control systems and methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |